What is the recommended ladder angle for securing a ground ladder on sloped or uneven ground?

What is the recommended ladder angle for securing a ground ladder on sloped or uneven ground?

• A. About 75 degrees
• B. 30 degrees
• C. 90 degrees
• D. 60 degrees

Answer: (A)

Maintaining a working angle of about 75 degrees to the ground is the key idea for a stable ground ladder on slopes or uneven surfaces. This angle provides the best balance between the ladder pressing into the ground and staying out from under the climber, which helps prevent the base from sliding and the top from tipping back. On sloped ground you adjust the base with wedges, levelers, or other supports so the ladder still sits roughly at a 75-degree incline relative to the surface (a practical way to set this is the 4:1 rule: for every four feet of ladder height, place the base about one foot out from the wall or surface). Choices that are too shallow, like 30 degrees, increase base slip; a steeper angle such as 60 degrees or vertical 90 degrees reduces base friction and raises the risk of tipping. So, the best answer is about 75 degrees.

Maintaining a working angle of about 75 degrees to the ground is the key idea for a stable ground ladder on slopes or uneven surfaces. This angle provides the best balance between the ladder pressing into the ground and staying out from under the climber, which helps prevent the base from sliding and the top from tipping back. On sloped ground you adjust the base with wedges, levelers, or other supports so the ladder still sits roughly at a 75-degree incline relative to the surface (a practical way to set this is the 4:1 rule: for every four feet of ladder height, place the base about one foot out from the wall or surface). Choices that are too shallow, like 30 degrees, increase base slip; a steeper angle such as 60 degrees or vertical 90 degrees reduces base friction and raises the risk of tipping. So, the best answer is about 75 degrees.